Portable speaker



FIG. 1 is a bottom perspective view of a portable speaker, showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is another perspective view thereof, shown in alternative position;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof. 

CLAIM The ornamental design for a portable speaker, as shown and described. 